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Screening Approach for the Discovery of New Hybrid Perovskites with Efficient Photoemission

机译：筛选具有高光发射效率的新型钙钛矿的筛选方法

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摘要

Owing to quantum confinement, low-dimensional hybrid perovskite materials have recently shown a great potential for applications in optoelectronics. Such compounds can exhibit broad- or narrow-band light emission, low-temperature solution processability, high thermal stability, and relatively high photoluminescence quantum yields (PLQY). However, the search for efficient phosphors with a specific set of characteristics remains difficult because the family of hybrid perovskites consists in an extremely large chemical system (i.e., different halides, metals, and organic molecules), and optical properties are not predictable prior to material synthesis and characterization. Here, is proposed a simple approach to screen a significant amount of new hybrid lead halide perovskites. The synthetic method by fast crystallization at low temperature enables the rapid identification of the materials exhibiting the targeted photoluminescence properties. This approach is tested for the discovery of hybrid lead halide perovskites with efficient white-light emission. Among 100 newly synthesized compounds, 5 exhibit intense white emission, and the in-depth characterization of a selected candidate shows high color rendering index (CRI) = 78 and a PLQY of 9%, which is equivalent to the record reported for hybrid perovskites. This compound exhibits a new structure type for warm white-light emitting hybrid perovskites with chains of corner-sharing PbX6.
机译：由于量子限制，低维杂化钙钛矿材料最近在光电子领域显示出巨大的潜力。这样的化合物可以表现出宽带或窄带发光，低温溶液可加工性，高热稳定性和相对高的光致发光量子产率（PLQY）。但是，寻找具有特定特征的高效磷光体仍然很困难，因为杂化钙钛矿家族属于一个非常大的化学系统（即，不同的卤化物，金属和有机分子），并且光学性能在材料制造之前是不可预测的合成和表征。在这里，提出了一种筛选大量新的杂化卤化铅钙钛矿的简单方法。通过在低温下快速结晶的合成方法可以快速鉴定出具有目标光致发光性能的材料。该方法经过测试，可发现具有有效白光发射的混合卤化钙钛矿。在100种新合成的化合物中，有5种表现出强烈的白色发射，并且对选定候选物的深入表征显示出高显色指数（CRI）= 78，PLQY为9％，这与报道的钙钛矿杂种相当。该化合物对带有角共享PbX6链的暖白色发光混合钙钛矿展现出一种新的结构类型。

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  • 来源
    《Advanced Functional Materials》 |2019年第1期|1806728.1-1806728.6|共6页
  • 作者

    Brochard-Garnier Stanislas; Paris Michael; Genois Romain; Han Quanxiang; Liu Yang; Massuyeau Florian; Gautier Romain;

  • 作者单位

    Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, 2 Rue Houssiniere,BP 32229, F-44322 Nantes 3, France;

    Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, 2 Rue Houssiniere,BP 32229, F-44322 Nantes 3, France;

    Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, 2 Rue Houssiniere,BP 32229, F-44322 Nantes 3, France;

    Shandong Univ, State Key Lab Crystal Mat, 27 Shanda Nanlu, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, State Key Lab Crystal Mat, 27 Shanda Nanlu, Jinan 250100, Shandong, Peoples R China;

    Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, 2 Rue Houssiniere,BP 32229, F-44322 Nantes 3, France;

    Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, 2 Rue Houssiniere,BP 32229, F-44322 Nantes 3, France;

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  • 正文语种 eng
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  • 关键词

    hybrid perovskite; photoluminescence; screening; white LEDs;

    机译：钙钛矿杂化;光致发光;屏蔽;白光LED;

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